Check Engine Light And Your BMW

So you see that infamous glow on your instrument cluster in your BMW, yep, it’s your check engine light, and it’s on. Now what?

What is a Check Engine Light?
The check engine light is part of the onboard diagnostics (OBD) system in your BMW.

What Does The Check Engine Light Mean When Illuminated?
When you see the check engine light illuminated in your dash, it means your BMW has detected a problem within its OBD system.

What Problems Can Trigger the Check Engine Light?
Ranging from minor to major, a slew of things can trigger the check engine light to come on in your BMW, including (but not limited to):

Loose gas cap

Faulty fuel injector

Blown gasket heads

Faulty oxygen sensors

Cracked and loose hoses

Faulty mass air flow sensor

Worn out spark plugs and wiring

Emission control system malfunction

What Should I do if my Check Engine Light Comes on?
Your best bet is to take it to a qualified BMW specialist at a reputable BMW service center for some diagnostic testing whenever possible. You'll want to make sure you have a qualified BMW repair shop that is equipped with BMW specific diagnostic equipment, such as a BMW GT-1 computer system or an Autologic computer.

The problem might not require immediate attention, but don’t wait too long because you don’t want the problem to persist and result in a costly repair at a later date.

If you also notice on your dash, in addition to the activated check engine light, that you have low oil pressure or your BMW is overheating, you should safely pull off the road as soon as you can and shut off the engine.

What Should I Expect When I Visit my BMW Mechanic for Diagnosis?
Your BMW expert will be able pinpoint the problem for you by connecting your BMW to a diagnostic scan tool. This tool will provide trouble codes stored in your electronic control system, and reveal why the check engine light came on. From there, your BMW specialist will advise you on what to do next for your BMW and recommend a proper course of action.